Electric magazine wrench



Aug. 13, 1935. A. MOOTER ELECTRIC MAGAZINE WRENCH 2 Sheets-Shet 1 Filed Oct. 20, 1954 Inventor .Z. A. M00591" By M Attorney l-II W Aug, 13, 1935. A. MOOTER ELECTRIC MAGAZINE WRENCH ,Filed Oct. 20, 1934 2 Sheets-Sheet 2 .E Q A Mooier BY r Attmney Patented Aug. 13, 1935 I UNITED STATES PATENT OFFICE ELECTRIC MAGAZINE WRENCH Lewis A. Mooter, Stillwater, Okla.

' Application October 20, 1934, 'Serial No. 749,293 (Claims. (Cl. 81-125) My invention relates generally to power driven tube I! which has a part l8 feeding lubricant to wrenches, and particularly to an electrically drivthe groove II for lubricating the contact of the en wrench having a magazine for containing and drum flange I 2 with thebearing flange ll dispensing nuts into position in the wrench to be The revoluble drum l4 has axially spaced from turned onto the bolt or stud which is to receive the head [3 the head I9 axially from which proone or more of the nuts, and an important object jects the elongated nut magazine tube 20 which of my invention is to provide a device of the'charhas thereon longitudinally spaced flanges 2| and acter indicated above which is simple and inex 22 which engage ball bearing structures 23-and pensive, rugged and efficient, and easily manipu- 24 attached to the interior of the casing extension lated. g I so that not only the magazine tube'20 but the 10 Another important object of my invention is adjacent end of the drum is revolubly supported to provide a device of the character indicated and prevented from moving longitudinally -on above which enables greatly speeding up operatheir axes. j tions of placing and tightening nuts on the studs n the interior of the tubular extension I is an} and bolts of machinery in the-operations of asannular rib 25 opposed to an annularrib 26 onsembling the same, especially inthe assembling the exterior of the magazine tube 20; and an an-v of automobiles on an automobile factory assemnular rib 2l-is fixed to the interior of the casing bly line. extension I and opposed to an annular rib 28 Other important objects and advantages of my, fixed near the outer endthereof on the magazine invention will be apparent from a reading of the tube 20. The described pairs of ribs act to posifollowing description in connection with the tion the packing members 29 and 30, respectively, drawings, wherein for purposes of illustration I which confine within the extension 1 between the have shown a preferred embodiment of my invenpackings a quantity of oil (not shown) which is tion. introduced through the inlet 3| which is provided In the drawings:-- with the snap cover 32, whereby the ball bearing F gure 1 s a top plan view of the embodiment. structures are kept adequately lubricated and Figure 2 is an enlarged longitudinal vertical. power losses from friction and wear are reduced sectional view, taken through Figure l approxito a minimum in the operation of the wrench. mately on the line 2-2 and looking in the direc- On the outer extremity of the magazine tube tion of the arrows. 2|! is an annular boxing 32' which is of channel Figure 3 is a transverse vertical sectional view cross section and provided with an enlarged lip taken through Figure 2 approximately on the line portion 33 which .is provided with a groove 34 re- 3-3 and looking toward the right in the direction ceiving an annular projection on the annulus 35.

of the arrows. v Leaf springs 36 and 31 extend longitudinally Figure 4 is a side elevational view of the electric in the boxing 32 to engage the cruciform nut remotor starting and stopping switch. tainers 38, 39 whereby the end nut 4| of the plu-' Figure is an elevational view taken from the rality of nuts 40 is prevented yieldably from mov left of Figure 4 and showing the relation of one ing outwardly of the outer end of the magazine of the stops or actuating fingers to the switch tube under the pressure of the helical spring 42 arm which are on the bolt engaging rod of the which is interposed between the head of the drum W I l4 and a washer 43 engaging the last one of the Referring in detail to the drawings, the nunuts. The leaf springs 36 and 31 are adequately meral 5 generally designates the embodiment strong to hold the members 38 and 39 from turn- -which comprises the casing 6 which is convening and releasing the last nut 41. a iently of cylindrical form and has an axial tubu- Extending through the drum l4 and centrally 45 lar extension I. through the nut magazine tube and through A removable cover 8 closes the open end of the the bores 44 of the nuts is the longitudinally casing 6 and is spaced outwardly from a partition movable rod 45 which normally has a position 9 centrally of which there is located a flange l0 slightly outwardly of the last nut 4! so as to en- 1 which has an annular bearing groove H therein gage the stud 46 ahead of the last nut 4! when which forms the guide and bearing for the annuthe wrench is placed in relation to the stud to lar flange l2 which projects from the head 13 of apply one or more of the nuts thereto. The inner the revoluble drum l4. The casing 6 has inwardly end of the rod 45 is attached to a large helical of the partition 9 a lubricant receiving neck I5 coiled spring 46 which is interposed between the closed by a snap cover It in which is arranged a inner end of the rod 45 and the head l3 ofthe l4. The rod has within the drum- M a switch operating finger 41 and a switch operating finger 48 longitudinally spaced outwardly from the finger 41, both of these fingers being in position'to engage the protuberances of the rotatable switch arm 49 of the start and stop switch 50. When the finger 41 engages the switch arm 49 the electric motor 5| is energized and through its pinion 52 engaged with the crown ear-53 on the left hand end of the drum rotates the drum l4 and consequently the nut magazine tube 28, so as to rotate the nut 4| and the other nuts which come into its place, onto the stud or bolt 46, it being remembered that the left hand movement of the rod necessary to apply the finger 41 operatively to the switch arm 49 is brought about by early contact of the right hand end of the rod 45 with the stud ahead of the nut 4|. As the nut is threaded on the stud, the rod 45 will be pushed progressively toward the left until the finger 48 engages the switch arm 49 and throws the switch to an ofi position thereby deenergizing the motor 5|. The switch and the fingers. and 48 are so arranged with respect to each other that the motor will be stopped immediately the nut has been threaded on the bolt or stud for the required distance, thereby saving unnecessary jarring of the motor and other mechanism of the wrench, as well as saving electric current, and enabling immediately withdrawing the wrench from the stud operated upon and transferring the same without adjustment to the next stud to receive a nut.

The motor-5| is conveniently mounted as indicated at 54 on the cover 8 of the casing 6 in which position its shaft 55 extends through the partition 9 so as to carry its pinion 52 in proper engagement with the crown gear 53. Connection with the switch 58 is made through contact rings 56 and 51 which are fixed to the interior of the casing 6 and engage corresponding contact rings 58 and 59 fixed to the exterior of the drum l4. A suitable conduit 60 leads from the contact rings 58 and 59 on the drum to the switch 50 while other eonduits 6| and 62 lead from the contactrings 56 and 51 on the casing 6 to'themotor 5| as indicated in Fimire 2.

An annulus 63 mounted on the magazine tube 20 between the packing structure 29 and the annulus 2| is provided with a wiping. ring 64 which prevents an undue quantity of the lubricant oil from moving in the left hand direction within the space between the tubular extension I and the nut magazine 20.

A suitable form of start and-stop switch is illustrated in Figures 4 and 5, containing a base or support 65 on which is rockably mounted the rotatable switch arm 66 havinglong arms 61 and 68 and short arms 69 and Ill. The long arms are adapted to engage the stationary contacts II and 12 which are mounted on the support so as to bridge these contacts and cause energization of i switch arm 49 which is engaged by the stops 4'I and 48 on the control rod 45. Suitable webs" and "I5 in the drum l4 support the switch 50 in place as indicated in Figure 2.

preferred embodiment of my invention, it is to be definitely understood thatI do not desire to limit the application of the invention thereto, and any change or changes may be made in the materials, and in the structure and arrangement of the parts, within the spirit of the'invention and the scope of the subjoined claims.

What is claimed is":-

l. A magazine nut wrench of the character described comprising a casing, a tubular nut mag- .azine rotatably mounted in the casing and containing in axially aligned-positions a plurality of nuts to be applied to receiving studs, motor means within the casing operatively engaged with said magazine for rotating the same for applying the nuts to the studs, switch means interposed between the motor and a source of elec trical energy, and controlrod means engageable with said switch means for starting and stopping the motor, said control rod being normally positioned in advance of the nut in the magazine to be first applied, the projecting part of the control rod being adapted to be first applied to the stud in advance of the'first nut to be thereby moved to a position in which it closes the switch and energizes the motor, said rod being adapted said magazine for rotating the same for applying the nuts to the studs,'switch means interposed between the motor and a source of electrical energy, and control rod means engageable with said switch means for starting and stopping the motor, said control .rod being normally positioned in advance of the nut in the magazine to be first applied, the projecting part of the control rod being adapted to be first applied to the stud in advance of the first nut to be thereby moved to a position in which it closes the switch and energizes the motor, said rod being adapted to be positioned by completion of thethreading of the nut on the stud so as to open said switch and deener'giz'e the motor, and spring means for holding the control rod normally in initial position in which it extends beyond the nut to be applied first.

.3. A magazine nut wrench of the character described comprising a casing, a tubular nut magazine rotatably mounted in the casing and cont aining in axially aligned pdsitions a plurality of nuts to be applied'to receiving studs, motor means within the casing operatively engaged with said magazine for rotating the same for applying the nuts to the studs, switch means interposed between the motor and a source of electrical energy, and control rod means engageable with said switch means for starting and stopping the motor, said control rod being normally positioned in advance of the nut in the magazine to be first applied, the projecting part of the control rod being adapted to be first applied to the stud in advance of the first nut to be thereby moved to a position in which itrcloses the switch and energizes the motor, said rod being adapted to be positioned by completion of the threading of the nut on the stud so as to open said switch and deenergize the motor, and spring means for holding the controlrod normally in initial po- 7 sition in which it extends beyond the nut to be applied first, and spring means in said magazine for moving the plurality of nuts along the magazine toward one end thereof. I

4. A magazine nut wrench of the character described comprising a casing, a tubular nut magazine rotatably mounted in the casing and containing in axially aligned positions a plurality of nuts to be applied to receiving studs, motor means within the casing operatively engaged with said magazine for rotating the same for applying the nuts to the studs, switch means interposed between the motor and a source of electrical energy, and control rod means engageable with said switch means for starting and stopping the motor, said control rod being normally positioned in advance of the nut in the magazine to be first applied, the projecting part of the control rod being adapted to be first applied to the stud in advance of the first nut to be thereby moved to a position in, which it closes the switch and energizes the motor, said rod being adapted to be positioned by completion of the threading of the nut on the stud so as to open said switch and deenergize the motor, and spring means for holding the control rod normally in initial position in which it extends beyond the nut to be applied first, and spring means in said magazine for moving the plurality of nuts along the magazine toward one end thereof, and spring controlled means at the delivery end of the magazine for holding the nuts against the tension of the last-mentioned spring means and arranged to yield when the nut is pressed on the stud so as to release the nut being applied and to engage the next nut to retain the same.

' LEWIS A. MOOTER. 

